섹시한 하숙집 아줌마, 더 섹시한 딸, 그리고 청순한 첫사랑까지?!세 여자와 함께 하는 파란만장 하숙 라이프가 지금 시작된다!모녀가 단 둘이 운영하는 하숙집에 머물게 된 신입생 은기. 낯선 서울 생활에서 그의 유일한 낙은 섹시한 모녀와의 은근한 밀당이다. 그런데 갑자기 고향에 있던 청순가련 첫사랑 순이가 은기를 보겠다며 무작정 하숙집에 찾아온다. 자신 옆에는 첫사랑 순이가, 문 너머에는 섹시한 글래머 하숙집 딸, 그리고 바로 옆 욕실에선 풍만한 몸매를 자랑하는 하숙집 아줌마까지… 스무살 숫총각 은기의 잠들 수 없는 밤이 시작된다.Eun-gi's eventful life in a boarding house has begun with the three ladies: a sexy owner of a boarding house, her daughter who is even sexier, and his innocent first love. Eun-gi, a freshman, has found his new place in a boarding house operated by mother and daughter when he came to Seoul to study. His only pleasure is to play along in the unspoken push-and-pull relationship with the mother or the daughter. One day, his first love, Soon-yi, who is innocent and docile, suddenly comes to visit him at the boarding house. With the sexy daughter of the boarding house behind the door, and the curvaceous lady owner of the boarding house in the bathroom next to his room, the 20-year-old virgin Eun-gi's sleepless night begins.